Understanding the Broth Dilution Method and MIC

What is the primary purpose of the broth dilution method in microbiology?

• To develop new antibiotics

• To determine the minimum inhibitory concentration (MIC) of antibiotics

• To identify bacterial species

• To measure the growth rate of bacteria

Why is the development of new antibiotics necessary?

• Antibiotics are not effective against viruses

• Antibiotics have a short shelf life

• Bacteria are becoming resistant to existing antibiotics

• Antibiotics are too expensive

What is the role of a spectrophotometer in the broth microdilution assay?

• To measure the temperature of the culture

• To adjust the optical density of the bacterial culture

• To mix the bacterial culture

• To sterilize the bacterial culture

What is the purpose of the growth control in the broth microdilution assay?

• To show how bacteria grow without the drug

• To ensure the medium is sterile

• To measure the effectiveness of the drug

• To adjust the optical density

What does a typical bacterial growth curve include?

• Lag phase, stationary phase, and death phase

• Lag phase, exponential growth, and stationary phase

• Exponential growth, stationary phase, and death phase

• Lag phase, exponential growth, stationary phase, and death phase